Gear.



E. J. FROST.

GEAR. APPLIQATION FILED MAR. 29, 1911.

ED111111 3.1101. 35% WM Patented July 25, 1911.

GEAR.

To all it may concern;

Be it known that I, EDWARD J. Fnos'r, a citizen of the United States,and a resident of Jackson, in the county of Jackson and State ofMichigan, have invented a new useful Gear, of whiclrthe following is aspecification.

This invention relates to thc teeth of gear wheels and its object is toprovide toothed gearing which shall be substantially noiseless inoperation, which may be easily and quickly repaired, and which may beconstructe ff so as to have a predetermined breaking point.

This invention comprises a body of any desired material and separateteeth of sheet metal, properly formed and secured in position, whichteeth may, if desired, be afterward accurately finished in a propermilling, planing, grinding or generating machine.

In the accompanying drawing, Figure 1 is a side elevation of a gearembodying this invention. Fig. 2 is a section showing one method ofsecuring the teeth in position. Figs. 3 and 4 are transverse crosssections showing other methods of securing the teeth.

Similar reference characters refer to like parts throughout the severalviews.

The body 1 of the gear shown in Fig. 1 may be of any desired material,and is formed with a series of holes 2, two for each tooth, which holesmay be countersunk at their ends. Slots are cut through the face of thebody into these holes. Teeth are formed from resilient sheet metal withcrowns 3, sides 4-,.and feet 5. These teeth are then slippedlongitudinally into the slots and holes in the body 1 as shown in Fig.1.

The corners 6 of the feet may be turned over as shown at 7 in Fig. 2, soas to hold the teeth in position. After the teeth are secured inposition, the gear may be placed in a grinding or milling machine sothat the teeth may be brought to the exact contours desired. -Gearsprovided with these resilient teeth are especially adapted to meshtightly with each other or with solid teeth, so as to avoid noise. Thestrength of the teeth can be determined with reasonable accuracy so thatreliance may be placed on these teeth giving way when dan- Speeificationof Letters Patent.

Application filed March 29, 1911.

Patentedzinly 25, 1911.

Serial No. 617,650.

gerous stresses are placed on machinery driven thereby.

In Fig. 3, the body 9 is shown formed With slots which taper outwardly.The sides 10 of the teeth have feet 11 as before described. Any fusiblemetal 12 may be poured around the feet of the sides, as shown, to firmlyhold the teeth in position. In Fig. 4 the ends 1 1 of the sides 15 ofthe teeth are shown roughened. These teeth may be placed in a propermold and the metal of the body 16 may be cast around these ends to unitewith them.

While any resilient metal may be employed, sheet brass will usually befound desirable for light loads and sheet steel for heavier loads,tempered spring steel being adapted for teeth where the loads are heavyand uneven.

Many changes in the designs and constructions of the various parts maybe made by engineers without departing from the spirit of my invention,which I claim is 1. A gear, comprising a body, and a series of teethformed of sheet metal independent of each other and having the inneredges of the sides of the teeth secured in the body and properly formedto prevent displacement.

2. A gear comprising a body having a series of holes along its edgeparallel to its axis and slots through its face connecting to saidholes, and a series of teeth formed of resilient sheet metal havingtheir inner edges inserted longitudinally in said slots and so bent asto be prevented from pulling out radially from the same.

3. A gear comprisinga body having a series of holes along its edgecountersunk at their ends and parallel to its axis and slots through itsface connecting to said holes, and a series of teeth formed of resilientsheet metal having the edges of their sides turned at an angle and slidlongitudinally into said slots and holes, the corners of said sidesbeing bent to prevent removal of the teeth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

EDWARD J. FROST.

Witnesses:

Gno. F. HOPKINS, A. R. FORD.

Copies of this patent ma; be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

